The type of aircraft that has no engine is called a glider. Gliders are fixed-wing aircraft that rely on the dynamic reaction of the air against their lifting surfaces to stay aloft, and their flight does not depend on an engine. They are designed to catch air currents and create lift, allowing them to fly without any powered propulsion
. Historically, gliders have been used for various purposes, including military cargo transport during World War II, such as the CG-4A glider, which was essentially a cargo-carrying airplane without engines
. Modern gliders are flown as a sport and for training. Additionally, there are experimental aircraft like the MIT "ion plane," which flies with no moving parts and no traditional engine, using ionic wind propulsion, but this is a very new and specialized technology rather than a common aircraft type
. In summary, the most common and well-known aircraft with no engine are gliders.
